{"id":"DEBIAN-CVE-2024-38540","details":"In the Linux kernel, the following vulnerability has been resolved:  bnxt_re: avoid shift undefined behavior in bnxt_qplib_alloc_init_hwq  Undefined behavior is triggered when bnxt_qplib_alloc_init_hwq is called with hwq_attr-\u003eaux_depth != 0 and hwq_attr-\u003eaux_stride == 0. In that case, \"roundup_pow_of_two(hwq_attr-\u003eaux_stride)\" gets called. roundup_pow_of_two is documented as undefined for 0.  Fix it in the one caller that had this combination.  The undefined behavior was detected by UBSAN:   UBSAN: shift-out-of-bounds in ./include/linux/log2.h:57:13   shift exponent 64 is too large for 64-bit type 'long unsigned int'   CPU: 24 PID: 1075 Comm: (udev-worker) Not tainted 6.9.0-rc6+ #4   Hardware name: Abacus electric, s.r.o. - servis@abacus.cz Super Server/H12SSW-iN, BIOS 2.7 10/25/2023   Call Trace:    \u003cTASK\u003e    dump_stack_lvl+0x5d/0x80    ubsan_epilogue+0x5/0x30    __ubsan_handle_shift_out_of_bounds.cold+0x61/0xec    __roundup_pow_of_two+0x25/0x35 [bnxt_re]    bnxt_qplib_alloc_init_hwq+0xa1/0x470 [bnxt_re]    bnxt_qplib_create_qp+0x19e/0x840 [bnxt_re]    bnxt_re_create_qp+0x9b1/0xcd0 [bnxt_re]    ? srso_alias_return_thunk+0x5/0xfbef5    ? srso_alias_return_thunk+0x5/0xfbef5    ? __kmalloc+0x1b6/0x4f0    ? create_qp.part.0+0x128/0x1c0 [ib_core]    ? __pfx_bnxt_re_create_qp+0x10/0x10 [bnxt_re]    create_qp.part.0+0x128/0x1c0 [ib_core]    ib_create_qp_kernel+0x50/0xd0 [ib_core]    create_mad_qp+0x8e/0xe0 [ib_core]    ? __pfx_qp_event_handler+0x10/0x10 [ib_core]    ib_mad_init_device+0x2be/0x680 [ib_core]    add_client_context+0x10d/0x1a0 [ib_core]    enable_device_and_get+0xe0/0x1d0 [ib_core]    ib_register_device+0x53c/0x630 [ib_core]    ? srso_alias_return_thunk+0x5/0xfbef5    bnxt_re_probe+0xbd8/0xe50 [bnxt_re]    ? __pfx_bnxt_re_probe+0x10/0x10 [bnxt_re]    auxiliary_bus_probe+0x49/0x80    ? driver_sysfs_add+0x57/0xc0    really_probe+0xde/0x340    ? pm_runtime_barrier+0x54/0x90    ? __pfx___driver_attach+0x10/0x10    __driver_probe_device+0x78/0x110    driver_probe_device+0x1f/0xa0    __driver_attach+0xba/0x1c0    bus_for_each_dev+0x8f/0xe0    bus_add_driver+0x146/0x220    driver_register+0x72/0xd0    __auxiliary_driver_register+0x6e/0xd0    ? __pfx_bnxt_re_mod_init+0x10/0x10 [bnxt_re]    bnxt_re_mod_init+0x3e/0xff0 [bnxt_re]    ? __pfx_bnxt_re_mod_init+0x10/0x10 [bnxt_re]    do_one_initcall+0x5b/0x310    do_init_module+0x90/0x250    init_module_from_file+0x86/0xc0    idempotent_init_module+0x121/0x2b0    __x64_sys_finit_module+0x5e/0xb0    do_syscall_64+0x82/0x160    ? srso_alias_return_thunk+0x5/0xfbef5    ? syscall_exit_to_user_mode_prepare+0x149/0x170    ? srso_alias_return_thunk+0x5/0xfbef5    ? syscall_exit_to_user_mode+0x75/0x230    ? srso_alias_return_thunk+0x5/0xfbef5    ? do_syscall_64+0x8e/0x160    ? srso_alias_return_thunk+0x5/0xfbef5    ? __count_memcg_events+0x69/0x100    ? srso_alias_return_thunk+0x5/0xfbef5    ? count_memcg_events.constprop.0+0x1a/0x30    ? srso_alias_return_thunk+0x5/0xfbef5    ? handle_mm_fault+0x1f0/0x300    ? srso_alias_return_thunk+0x5/0xfbef5    ? do_user_addr_fault+0x34e/0x640    ? srso_alias_return_thunk+0x5/0xfbef5    ? srso_alias_return_thunk+0x5/0xfbef5    entry_SYSCALL_64_after_hwframe+0x76/0x7e   RIP: 0033:0x7f4e5132821d   Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d e3 db 0c 00 f7 d8 64 89 01 48   RSP: 002b:00007ffca9c906a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139   RAX: ffffffffffffffda RBX: 0000563ec8a8f130 RCX: 00007f4e5132821d   RDX: 0000000000000000 RSI: 00007f4e518fa07d RDI: 000000000000003b   RBP: 00007ffca9c90760 R08: 00007f4e513f6b20 R09: 00007ffca9c906f0   R10: 0000563ec8a8faa0 R11: 0000000000000246 R12: 00007f4e518fa07d   R13: 0000000000020000 R14: 0000563ec8409e90 R15: 0000563ec8a8fa60    \u003c/TASK\u003e   ---[ end trace ]---","modified":"2026-09-15T09:03:08.722172205Z","published":"2024-06-19T14:15:14.290Z","upstream":["CVE-2024-38540"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-38540"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.119-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-38540.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-38540.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-38540.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}